Stock Market Sectors

The U.S. stock market is organized into 11 sectors under the Global Industry Classification Standard (GICS), a framework developed jointly by S&P Global and MSCI. This classification system groups 30,567+ publicly traded companies by their primary business activity, making it possible to compare performance, identify trends, and build diversified portfolios across the entire market.

Sector analysis is one of the most effective tools available to investors. By tracking how capital flows between sectors, you can identify which areas of the economy are gaining momentum and which are losing favor. Cyclical sectors like Technology and Consumer Discretionary tend to outperform during economic expansions, while defensive sectors like Utilities and Consumer Staples often hold up better during downturns.

Each sector page on Stock Expert AI provides AI-powered MoonshotScore ratings, real-time price movements, top gainers and losers, industry breakdowns, and comprehensive stock tables. The MoonshotScore evaluates each company across nine quantitative factors—including revenue growth, analyst consensus, and technical momentum—to surface stocks with the strongest growth potential within each sector.

Currently, the largest sector by company count is Financials with 13,533 stocks, while the smallest is Utilities with 655 stocks. Use the sector pages below to drill into each area of the market.

1.

Financials

13,533 (44.3%)

2.

Healthcare

3,644 (11.9%)

3.

Industrials

2,694 (8.8%)

4.

Technology

2,684 (8.8%)

5.

Consumer Discretionary

1,688 (5.5%)

6.

Materials

1,579 (5.2%)

7.

Energy

1,257 (4.1%)

8.

Communication Services

1,124 (3.7%)

9.

Consumer Staples

890 (2.9%)

10.

Real Estate

819 (2.7%)

11.

Utilities

655 (2.1%)

Stock Expert AI evaluates every publicly traded U.S. stock using the MoonshotScore, a proprietary 0–100 composite rating. The score synthesizes nine quantitative dimensions: revenue growth trajectory, profitability and margins, analyst consensus estimates, insider transaction patterns, institutional ownership shifts, short interest dynamics, technical momentum signals, earnings surprise history, and valuation multiples relative to peers.

Price data is sourced from Financial Modeling Prep (FMP) with Yahoo Finance as a fallback. Fundamental data comes from SEC filings, FMP, and Alpha Vantage. Sentiment signals are derived from aggregated analyst ratings and news flow. All metrics refresh during market hours; after-hours data reflects the most recent closing values.

Sector and industry classifications follow the Global Industry Classification Standard (GICS), the same taxonomy used by S&P and MSCI. Companies are assigned to one of 11 sectors and further classified into 50+ industries based on their primary revenue source.

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